About the Authors

Andries Ter Maat

termaat@orn.mpg.de

Affiliation Max Planck Institute for Ornithology, Eberhard-Gwinner-Straße, Seewiesen, Germany

Lisa Trost

Affiliation Max Planck Institute for Ornithology, Eberhard-Gwinner-Straße, Seewiesen, Germany

Hannes Sagunsky

Affiliation Max Planck Institute for Ornithology, Eberhard-Gwinner-Straße, Seewiesen, Germany

Susanne Seltmann

Affiliation Max Planck Institute for Ornithology, Eberhard-Gwinner-Straße, Seewiesen, Germany

Manfred Gahr

Affiliation Max Planck Institute for Ornithology, Eberhard-Gwinner-Straße, Seewiesen, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ATM LT MG. Performed the experiments: LT SS ATM. Analyzed the data: LT ATM. Contributed reagents/materials/analysis tools: HS ATM. Wrote the paper: ATM LT MG.